Crankcase, crankshaft, and bearing assembly



-Dec.'7, 1943. R. M. MAGNUSON CRANK CASE, CRANK SHAFT, AND BEARING ASSEMBLY Filed Oct. 9 1941 2 SheetsSheet l 4 TTUQNE Y CRANK CASE, CRANK SHAFT, AND BEARING ASSEMBLY 2 sheets sheet 2 R. M. MAGNUSON Filed Oct. 9, 1941 A m m N 6 Q N4 0 i w N i WM A fl W NW aw \N 0 \m m RP mm \m Dec. 7, 1943.

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ASSEMBLY Roy M. Magnuson,

"Food Machinery Corporation,

Campbell, Caiit, assignor to San Jose, Calif.,

a corporation of Delaware Application October 9, 1941, Serial No. 414,330 '1 Claims. (Cl. 308-179) This invention relates to pump construction and has particular utility in the highpressure spray pump art.

Numerous problems are presented in the design and assembly of high pressure spray pumps due to the ,high load factors which the crank shafts of these pumps are required to sustain. and one of the features of these pumps which must be especially strong is the means for mounting the bearings. I

In U. S. Letters Patent No. 2,038,747 issued to me April 28, 1938, on 9. Spray pump I show a bearing construction in which the bearings of the crank shaft are mounted in cup shape members inserted inwardly intothe crank case through These cup shape members are then bolted to the outer face of the crank case. I have found in practice that in'=order for this mounting to satisfactorily support the bearings under the high loads to which these are subject, it is essential that these members when assembled-have a press fit in thecrank case openings receiving them.

aligned holes formed in the crankcase.

I shown therein a spray pump corporated ina spray pump with the various elements involved completely assembled.

Fig. 2 is a view similar to Fig. 1 showing a portion of the parts involved in my invention in the process of assembly.

Referring specifically to the drawings, I have it including a crank case ii having spaced walls I2 which are provided with aligned openings II, the crank case having an open mouth ll which when the pump is assembled is adapted to be covered by a cover plate l5. Journalled in suitable bearings provided in the walls I2 is a drive shaft 20' having drive pinions 2!.

The pump it also includes a crank shaft 22 a and a pair of *master drive gears 23 which are connected together by a crank pin 24 and which The reason for this necessity is the long distances between the planes in which the cupvshape memcrank case and the planes in which the cup-shape mem bers support the crank shaft bearings.

It is impractical, however, to assemble these members on the crank case with a press fit as it is necessary that these pumps be repaired in the field byunskilled labor without access to the equipment necessary to .removethese members when so fitted.

it is accordingly an object of this invention to provide'a strong mounting for crank shaft. .bearings in a spray pump which are of such a nature as to permit thepump to be readily disassembled in the field without the use of special tools or highly skilled mechanics.

It is a further obiect of my invention to provide a novel crank case, crankshaft and bearing assembly suitable for use in spray pumps and in which the connection between each bearing mounting member and the crank case lies in a plane relatively close'to the plane in which this mounting member supports a crank shaftbearing.

Th manner of accomplishing the foregoing objects, as well as further objects and advantages, will be made description taken in connection with the accompanying drawings. in which:

Fig. l is a diagrammatic cross sectional view of a preferred embodiment manifest in the following.

= trunnions and by -mesh with the pinions inserted through the crank pattern 0! are in turn connected by crank pins 25 to members "from which trunnions 21 extend laterally,

these trunnions being coaxial with each other and 'withthe master drive gears 23.

It is desired to journal the crank shaft 22 in the crank case H so that master drive gears 23 2| and with such a strong bearing construction that the crank shaft will be maintained, in spite of the enormous loads carried thereby, in perfect parallelism with the drive shaft 20. In my invention this is accomplished'by the provision of ball bearings 30 which have apressed fit over the trunnions 21 so as not to extend beyond the extremities of these bearing mounting rings 3| which slidably fit over the outer races of the bearings 80, these rings having outer annular axial flanges 33. Provided inthe rings 31 are threaded holes ll which are located so that when these rings are properly positioned in the assembly of the pump these holes will'be in alignment with :holes 35 provided in the walls I2.

- The assembly of the pump it is effected as are assembled on crank shaft 22 and the latter the crank case H, as shown in Fig. 2. This brings the gears 22 into'inesh with the pinions 2| which centers the crankshaft 22 axially relative to the crank case due to; the herringbone thesegears and pinions. When the assembled parts thus inserted; into the crank case I come opposite the openings It so that they are 0! my invention as inas the openings ll coaxial'withthese. openings, the rings ii are shifted -outwardly'to extend the flanges 33 into The openings it are now covand rings 3| case mouth II andered with plates 4i having suitable apertures which when these plates are properly positioned are aligned with the holes 35 in the walls i2.

When the plates 4| are thus positioned, and with the balance of the parts assembled as aforesaid, cap screws 42 are extended through the aforementioned holes in the plates and through the holes 35 of the walls l2 and "are screwed into the, threaded holes 34 in the rings 3| The bearing assembly of the present invention is now completed, this complete assembly being illustrated in Fig. 1.

In this figure the pump itself is shown completely assembled with piston connecting rods ill being sprung or cracked by the heavy loads im-- posed on the crank shaft 22 in the operation of the pump.

Not only do'the elements of my pump l2 provide an extremely sturdy structure when united, as shown in Fig. 1, but the mode of assembly and disassembly of these elements is extremely easy to perform and greatly facilitates the manufacture and the maintenance of these pumps in the field.

While I have shown and described only a single embodiment. of my invention, it is to be understood that other means may be used which still come within the spirit of the invention and the scope of the appended claims.

What I claim is:

1. In a crank case, crank shaft and bearing assembly, the combination of: a crank shaft with coaxial end trunnions; ball bearings fitted over said trunnions; bearing supporting rings ,sur-

rounding said bearings and axially adjustable thereon; a crank case having spaced end walls and an opening therebetween adequate for admitting broadside into said crank case said crank shaft carrying said bearings and rings as aforesaid, with said bearings and rings disposed closely inside said end walls and parallel therewith, said rings being adjustable axially on said bearings to bring said rings into contact with inner faces of said end walls; and meansto se-' cure said rings to said inner faces of said end walls to integrate said assembly.

2. In a crank case, crank shaft and bearing assembly, the combination of a crank shaft with coaxial end trunnions"; ball bearings fitted over said trunnions; bearing supporting rings-surrounding said bearings and axially adjustable thereonfa crank case having spaced end walls and an opening therebetween adequate for ad-' mitting broadside into said crank case said crank shaft carrying said bearings and rings as aforesaid, with said bearings and rings disposed closely inside said end walls and parallel therewith, said rings being adjustable axially on said bearings to brin g said rings into contact with inner faces of said end walls; flanges on said rings, there being openings in said walls into which said flanges fit when said rings are adjusted axially as aforesaid; and means to secure said rings to said inner faces of said'end walls to integrate said assembly.

rings being adjustable 3. In a crank case, crank shaft and bearing assembly, the combination of: a crank shaft with coaxial end trunnions; ball bearings fitted over said trunnions; bearing supporting rings surrings being adjustable axially on said bearings to bring said rings into contact with inner faces of said end walls; means on the inner edges of said rings for engaging said bearings to limit axial movement of the latter when said rings contact said end walls as aforesaid; and means to secure said rings to said inner faces of said end walls to integrate said assembly.

4. In a crank case, crank shaft and bearing assembly, the combination of: a crank shaft with coaxial end trunnions; ball bearings fitted over said trunnions; bearing supporting rings surrounding said bearings and axially adjustable thereon; a crank case having spaced end walls and an opening therebetween adequate for adinitting broadside into said crank case said crank shaft carrying said bearings and rings as aforesaid, with said bearings and rings disposed closely inside said end walls and parallel thereto, said rings being adjustable axially on said bearings to bring said rings into contact with inner faces of said end walls; flanges on said rings, there being openings in said walls into which said flanges fit when said rings are adjusted axially as aforesaid; means on the inner edges of said rings for engaging said hearings to limit axial movement of the latter when said rings contact said end walls as aforesaid; andmeans to secure said rings to said inner faces of said end walls to integrate said assembly.

5. In a crank case, crank shaft and bearing assembly, the combination of: a crank shaft with coaxial end trunnions; ball bearings fitted over said trunnions; bearing supporting rings surrounding said bearings and axially slideable thereon; a crank case having spaced end walls and an opening therebetween adequate for admitting broadside into said crank case said crank shaft carrying'said bearings and rings as aforesaid, with said bearings and rings disposed closely inside said end walls and parallel thereto, said axially on said bearings to bring said rings into contact with inner faces of said end walls; flanges on the outer ends of said rings adjacent the inner diameters thereof, there being openings in said end walls into which said flanges fit when said rings are adjusted axially as aforesaid: shoulders adjacent outer diameters of said rings said shoulders engaging inner faces of said end walls; and means to secure said rings to said inner faces of said end walls to integrate said assembly.

6. In a crank case, crank shaft and bearing assembly. the combination of: a crank shaft with coaxial end trunnions; ball bearings fitted over said trunnions; bearing supporting rings surrounding said bearings and axially adjustable thereon; a crank case having spaced end walls and an opening therebetween adequat for admitting broadside into said crank case said crank shaft carrying said bearings and rings as aforesaid, with said bearings and rings disposed closely inside said end walls and parallel thereto, said rings being adjustable axially on said bearings to bring said rings into contact with inner faces of said end walls; flanges on said rings, there being openings in said walls into which said flanges fit when said rings are adjusted axially as aforesaid; and a series of screws extending through said walls from the outside and into i said rings to secure said rings to inner faces of said walls to integrate said assembly.

7. In a crank case, crank shaft and bearing assembly, the combination of: a crank shaft with coaxial end trunnions; ball bearings fitted over said trunnions; bearing supporting rings surrounding said bearings and axially adjustable thereon; a crank case having spaced end walls 7 I i 3 and an opening therebetween adequate for admitting broadside into said crank case said crank shaft carrying said bearings and rings as aforesaid, with said bearings and rings disposed closely inside said end walls and parallel thereto; said rings being adjustable axially on said bearings to bring said rings into contact with inner faces of said end walls; means to secure said rings to said inner faces of said end walls to integrate said assembly; and means disposed outwardly from said-bearings to limit the axial movement of the latter.

ROY M. MAGNUSON 

